Sprinkler head and nozzle



J. O. HRUBY, JR

SPRINKLER HEAD AND NOZZLE May 19, 1953 2 Sheets-Sheet 1 Filed April 10.1950 Atorney INVENTOR JOHN O. HRUBYJR.y

Www/WMM May 19, 1953 J. o. HRUBY, JR

sPRINxLER HEAD AND NozzLE 2 Sheets-Sheet 2 Filed April 10, 1950 JOHN O.HRUBY JR. BY @MAQ/WMM Attorney Patented May 19, 1953 UNITED STATESPATENT OFFICE SPRINKLR HEAD AND J ohn O. Hruby, Jr., Glendale, Calif.Appliaftion April 10, 1950, Serial N0. 154,983

9 Cl'diis. (Cl. 299`1) This invention relates to fluid discharging anddistributing devices and relates more particularly to sprinkler headsand nozzles. It is a general object of the invention to provide improvedsprinklers and nozzles of the type disclosed in my copending applicationfor United States Letters Patent Serial Number 80,287, filed March 8,1949, now Patent No. 2,589,942.

In my earlier-filed application, above identified, I have disclosednozzles and sprinklers characterized by a tubular body through which thestream of water or other iluid is discharged, a stem of smaller diameterextending longitudinally in the body and loosely restrained therein andmeans for imparting a rotary or swirling motion to the fluid as itpasses outwardly around the stem, this motion of the fluid causing thestem to gyrate or wobble around in the body while inclined with respectto the axis thereof, so that the stem breaks the issuing fluid streaminto well distributed rain-like drops.

In accordance with the present invention. the above-mentioned stem istubular to conduct an inner iluid stream of substantial volume and isprovided at its outer portion with discharge ori ces whereby the movinginclined stem not only breaks up the rotating fluid stream flowingaround it but also discharges one or more jets of fluid which follow a`generally rotary course to obtain an eiective wide distribution ofrainlike drops. It is therefore another object cf this invention toprovide a sprinkler head or nozzle of the character mentioned embodyingsimple. effective means for producing inner sprays of rain-like dropsand one or more outer streams of rain-like drops for covering orirrigating the area around the space covered by the inner sprays. Theelements of the device may be reF lated and arranged so that the streamsissuing from the tubular stern discharge through the substantiallyannular outer end rotating stream to wipe or carry away this uid in the.form of somewhat fan or curtain-like inner sprays while the streamsfrom the tubular stem continue outwardly beyond these fan orcurtain-like streams. Thus the spray pattern obtained by the deviceassur-es the heterogeneous or unpredictable "rain drop fall to theground not only `in the outer region of the area being irrigated butalso in the inner region of that area. -By actual observation of theoperation of my device. it has been found that there is a substantiallyequal distribution or discharge of fluid throughout the entire selectedarea without an undesirable excessively concentrated fall of the uid inany 2 given zone or portion of the area. Owing 'to the eccentric motionof the inclined v 'J'obbling tubular stem, the spray pattern is in thenature o! a series of interm'eshing ellipses which do not necessarily'repeat identical paths during ythe successlve cycles of stem movementand therefore do not concentrate the drop fall at any given point orpoints.

Another object of the invention is to provide a sprinkler or nozzle ofthis character that is operable to discharge a large volume of fluid ina most economical manner. The device priere a minimum of resistance tofijow and therefore creates little back pressure and operates to dis'-charge the water or other fluid in the form oi. relatively large dropswith little or no inist or fine spray. This is of primo importance inlow n humidity yareas and in windy districts when; the wastefulevaporation and blowing ofthe mist produced by most prior sprinklers andnozzles' is a distinct disadvantage of such prior devices. Furthermore,the free action of the device of my present invention is v'such that 'aneiectve delivery of the rain-like drops is obtained even Where only lowpressures are available and as- Su'reS the delivery 0f a axlmli vol'e Weter and the maximum coverage or distributin with a given supply pressureand volume condi tion. This' is important to the farmer 'or orchardistwho is often obliged to procure the largest volumetric delivery of waterpossible in a 'given period of time; The large capacities of thedischarge passages andori'ces and the eccentric wobbling action of thetubular stem preclude clogging o! the device by sand, rust or othersolid matter and, in fact, the motion of the stem serves to actuallyclear large solid matterparticles from'the sprinkler. The ability ci!thespi'inkler to discharge a large volui f yatf with a minimum of backpressure permits liquid fertilizer to be induced or aspirated directlyin@ to the supply stream to be discharged from the sprinkler togetherwith the water. Iii the past it has been necessary to employ expensiveDump` ing equipment to force the liquid fertilizer into the 'supplystream because of the high hack pressure or resistance to dow created bythe convem tional sprinklers.

Another object of the invention is to provide a sprinkler or nozzle ofthis class incorporating means of adjustment to obtain practically anydesired extent distribution or coverage iinder various prevailing supplypressure'and volume conditions. The device may iiicdipdate anadinstinent for the port or ports of discharge Iiii the tubular stem tocontrol or regulate the volume and the vertical angle of the streamsissuing from the stem and, if desired, the device may include means ofadjustment at the intake end of the tubular stem to adapt the device tohandle supply pressures of different values and yet obtain the desiredvertical angle of discharge from the outer end of the stem.

A further object of the invention is to provide a device of thischaracter wherein the rotating or spiraling outer stream of water servesas the motive power, while offering a minimum of back pressure, causingthe tilted tubular stem to swing through an annular pat'h and about itspoint of mounting so as to roll or ride on the internal surface of thetubular body, thus obtaining a sun-and-pianet friction drive. In actualoperation the stem may move through its inclined circular path at aspeed of from 1,000 to 2,000 revolutions per minute, depending upon thepressure and volume conditions, while the frictional`rolling engagementof the stem on the inner surface of t'he body causes the stem to rotateabout its own inclined axis at a speed of from to 75 revolutions perminute. If desired, a positive gear drive may be provided between thestem and the wall of the body by forming meshing teeth or serrationsthereon so that the stem is positively rotated about its ownlongitudinal axis as it swings about its point of attachment. In certainembodiments of the invention, where a slower rotation of the stem isdesired, as in orchard irrigators, the discharge orifices or tubes ofthe stem may be pitched in such a manner that the reactive effect of thefluid discharging therefrom tends to reduce the rate of rotation of thestem without, of course, materially affecting the speed of wobbling orgyration of t'he stem about its point of mounting in the body. It issignificant that the motor action which produces the wobbling androtation of the tubular stem is not conducive to appreciable backpressure.

A still further object of the invention is to provide a device of theclass mentioned that is extremely simple and inexpensive to manufacture.The major portions of the sprinkler or nozzle may be fabricated fromstandard metal tubing appropriately force fitted or otherwise assembled.

Other objectives and features of the invention will become apparent fromthe following detailed description of typical preferred embodiments,throughout which description reference is made to the accompanyingdrawings, wherein:

Figure 1 is a longitudinal sectional view of one form of the invention;

Figure 2 is an enlarged fragmentary longitudinal sectional Viewillustrating the loose mounting or restraining means for the tubularstem. being a view taken as indicated by line 2 2 on Figure 3;

Figure 3 is a transverse sectional view taken as indicated by line 3 3on Figure 2;

Figures 4 and 5 are longitudinal sectional views of other embodiments,Figure 4 illustrating a portion of the device in side elevation;

Figure 6 is a perspective view of a sprinkler of the invention embodyinga deflector;

Figure 7 is a plan view of the device illustrated in Figure 6 with thetubular stem appearing in transverse cross section;

Figure 8 is a longitudinal sectional view of still another form of theinvention;

Figures 9 and 10 are transverse sectional views taken as indicated bylines 9-9 and I0-I0, respectively', on Figure 8; and

Figures 11, l2 and 13 are diagrammatic views illustrating typical spraypatterns obtained with the sprinklers of the invention.

The embodiment of the invention illustrated in Figures 1, 2 and 3 may besaid to comprise generally a tubular body I0 adapted to be connectedwith a source of fluid under pressure such as a hose or pipe P, atubular fluid-discharging stem II in the body I0, means I2 forrestraining and positioning the stem II for axial movement, rotation andangular or swinging movement about a point spaced from the outer end ofthe body, orifices I3, or their equivalent, for causing a stream offluid to spiral or rotate around the stem II to actuate the same, andmeans I4 for regulating or adjusting the fluid flow through the stem II.

The body I0 may be varied greatly in construction and design, dependingupon the intended application or use of the device. In the simplepreferred embodiment illustrated, the body I0 is a length of tubing openat its outer end for the discharge of fluid. To facilitate connection.of the body I0 with the pipe P or other source of fluid supply, anadapter-like part I5 may be press fitted or otherwise secured on theouter portion of the body and the adapter part is shown screw threadedon the pipe P. The body I0 may extend into the pipe P and is receivedtherein with considerable clearance, leaving an annular fluid passageI6. In the preferred construction the interior of the body I0 is beveledor flared at the outer extremity of the body as shown at Il.

The stem I I is themoving element of the nozzle or sprinkler and isarranged longitudinally within the body Ill.` In accordance with thisinvention, the stem I I is tubular and in practice maybe a simple lengthof metal tubing. I prefer to make the stem il of substantial length toextend through the body I0 from one end to the other. As shown in thedrawings, the stem I I extends outwardly beyond the outer end of thebody I0 and projects from the inner end of the body to protrude into thepipe P. The external diameter of the stem II is considerably less thanthe interna] diameter of the body I0, leaving an annular fluid passageI8 which also forms a space in which the stem is free to gyrate orwobble. The outer end portion of the tubular stem II is provided with adeflector or -head I9 which may either be formed integral with the stemor formed as a separate part press fitted or otherwise secured on thestem. The head I9 may be given various shapes as desired. In theconstruction illustrated in Figure l, the head I9 has a polygonal marginand its under side slopes upwardly and outwardly to assist in directingthe fluid issuing from the passage I8, the angle of inclination beingselected to suit the intended use. The head I8 is larger in diameterthan the body I0 so as to serve as a valve. When fluid is dischargingfrom the sprinkler, the fluid flow raises the stem I I so that the headI 9 is in a position such as illustrated in the drawings, but. when thedevice is not in use, the under side of the head I9 rests or seatsagainst the outer end of the body to seal off the sprinkler. Thisprevents the entrance of soil and other solid matter into the body I0and seals off the body against the entrance of air, thereby reducingcorrosion of the sprinkler parts. The deilector head I9 may be quitelarge in diameter as illustrated in Figure 5 and where the sprinkler isintended for In Figure l I have shown a valve screw 28 threaded in thelower `end of the stem I I to control the fluid inlet ports 2I. Thisscrew 28 may be employed to regulate the flow into the stem I I and thuscompensate for differences in supply pressure. For example, where anumber of the sprinklers are employed in an irrigation system, the screw28 of the sprinklers at the lower parts of the pipeline system may beadjusted to partially close their respective openings 2I so that thefluid flow through the stems II of those sprinklers corresponds with theflow through the stems I I of the sprinklers located at higher levelswhere the fluid pressure is lower.

The invention may be embodied in a pop-up type lawn sprinkler as showniniFigure 5. In this construction the above-described part I5 isreplaced by a member 30 force fitted or otherwise secured to the outerend of the body I0 and provided with a large horizontal flange 3I to beinstalled at ground level. The upper end of the member 30 has a centralrecess 32 to receive the deflector head I9 when the device is not in useand the stem II is retracted. In this case the deflector head I9 ispreferably at the upper extremity of the stem I I so that there are noprojecting parts above the flange 3| when the device is not in use. Theself-closing feature is, of course, embodied in other types ofsprinklers of the invention.

It is contemplated that stationary deflectors of various shapes andsizes may be employed on the sprinklers. Thus in Figures 6 and 7 I haveshown a deflector 33 secured to the body part I5 l by brazing or thelike. The deflector 33 has a generally horizontal basin portion 43 withupturned margins and the deflector extends vertically upward from thebasin to project above the stem I I when the latter is in its raisedoperative position. An upwardly and inwardly sloping or curved roofportion 44 continues upwardly from the deflector. The particulardeflector 33 illustrated is designed to provide a flow pattern orsprinkler coverage of about 180 degrees, the deflector extending asubstantial distance in both directions from the body part I5. Theintermediate or main wall portion of the deilector 33 may besubstantially flat and rearwardly inclined while its two Verticalmargins are curved inwardly or forwardly, as at 34, to direct thestreams of water forwardly.

The arrow A in Figure 7 indicates the direction of gyraticn of the stemI l about its mounting means I2 while the arrow B designates thedirection of rotation of the stem about its own axis as a result of thesun-and-planet type frictional engagement of the inclined stem with theinternal surface of the body I0. As the inclined stem I I is gyratedabout the means I2 inthe direction of arrow A, by the action of theangular streaf of fluid flowing through the passage I8, the stein ridesor rolls along the inner surface of the body IIJ and as a consequence isrotated in the direction B. Thus the streams C from the openings 26discharge radially and move in the direction of arrow B and as thesestreams impinge against the deflector 33 they are directed forwardly oraway from the deflector by the curved margin'34. As shown in theleft-hand portion of Figure 7, these streams C deflected in this waycross the paths of the same streams C that have moved beyond the end ofthe deflector 33. the inclined stem II gyrates in the body II), theeccentricity of the stem leaves a constantly moving or rotating area ofthe passage I8 open for ASl the discharge of fluid. This region isdesignated 35 in the drawings. The fluid stream discharging from thisregion 35 of the passage I8 is deflected outwardly by the head I9 and isdesignated D in Figure 7. The stream D rotates by reason of the gyrationor circular path taken by the stem I I and the stream is deflected bythe margin 34 of the deflector 33 so as to cross the path of the samestream that has moved beyond the deflector. This is shown in therighthand portion of Figure 7. A portion of the water falls into thebasin 43 as a result of the interference of the streams and as a resultof the water being stopped at the deflector. This water is not retainedin the basin but is picked up and carried away by streams C and D asthey move across the deflector.

As described above, the stem II gyrates and rolls about in the end ofthe body I0 at a much greater rate than the speed of rotation of thestem on its own axis. However, in certain sprinklers, for example. inthe large types intended for orchard irrigation, it may be desired tofurther reduce the speed of rotation of the stem about its own axis sothat the streams C issuing from the stem and irrigating the outer zoneof the sprinkled area travel at a slower rate. In Figures 8 and 9 I haveshown discharge nozzles or tubes 4I! secured in the openings 26 of thestem I I and shaped or arranged to retard the speed of rotation of thestem II. The tubes 40 project outwardly beyond the stem II and areeither curved or pitched tangentially and in corresponding directions sothat the reactive effect of the fluid discharging from them slows downor brakes the rotation of the stem II about its own axis. Because thestem II rotates about its own axis in the direction B, which is oppositeto the direction A of gyration produced by the angular flow of fluid inthe passage I 8, the tubes 40 are pitched in the same direction as theopenings I3. This relationship is illustrated in Figures 9 and l0. Thedistribution tubes 40 .project some distance from the stem II so thatthe streams C issuing from the tubes do not intersect the inner stream Dissuing from the passage I8. However, the tubes 40 themselves pass'through the stream D to assist in breaking up the stream.

The invention contemplates a positive geared or meshing drive betweenthe gyrating stem II and the wall of the body opening I3. Figure lillustrates teeth or serrations 4I on the stem II for cooperating ormeshing with similar serrations 42 on the internal surface of the bodyI0 to gear the stem to the body and thus insure positive rotation of thestem II about its longitudinal axis as the stem gyrates. It is to beunderstood that the serrations or teeth 4I and 62 may be incorporated.in other embodiments of the invention.

It is believed that the operation of the nozzles or sprinklers will bereadily understood from the foregoing detailed description. Referring tothe type of sprinkler illustrated in Figures 1 to 5, inclusive, thefluid takes two paths or courses through the sprinkler. In one path itflows through the passage I6 to enter the tangential openings I3 andflow outwardly through the passage I8 and discharge from the outer endof the body. The second path of the fluid is through the openings 2l orthe end 2li of the stem II for flow through the stem and for dischargefrom the openings 26. The openings I3 impart angular motion to the fluidflowing out through the @pooles .It this; motion syretiooof .the Steno.H about its mougins in le The stream .D on@ or the @roo oovoroo Joy the.omission oro- .Stroemof Wotoriowiig .from the Omn Portion ,3,5 throughoyoporoiiol- The .Sprinkle ntf'oll termes of the 9 on that the stream Dissuing thererfro or .g @rod gentoo@ to tom ivi tbo'wowll of tho'body H1so that the str-oem C .issuing from the .openings 26 roto@ in thoIsizf-ofstiezo Bf "Those A .S1/rooms whose vol lotes loy the lo.

w 2.1, are proj toreo .oi s toeiooof tineilolli .from Soli.1 sposta,...llyoontmu 1 .xngshwa is qu' al1 v'oluios; it is riot QT' ,oq'rfltinuou'sstrorjn viously dosoribeq, trie volume am! @rotor-etno. im 9.-.1 theReseo'lorarched d'revtioriof thestreeip .from liope- 20 Q". 3.5: Theif?? .o -.n,gQf-h-.n9n19m-" ings ze may be 'regulated tw111"'byadg.ustng the ous '.heraoter @pdb mgmooe op .of separaterainsorew 2:1." l A 'I A' I n 111@ @TOP-5, di? Tf1@ Sfr? t slgstaildOTC-e @3" any 'eigures 11, I12y and 1 3 ilmtrete in e diagramono pointond'tiorofore oo .rlnoy ,injure .or Llorio'zlo matic manner typigti'spesi' 'pgttelrgg Bf .the @wiwi/.oil .erode olio soil. sprinklers.Fgliie 14.1 showsstrearn C ,dsharg- 25 .0.1' .dlSlQd-o DI??? Q 1 0T90,11?- ng @.0 the left( "0h15 .Sm ,i5 `iflgl-y .one .0f ri-qmail???QnOfith-Sprmlersit has We. the Openings 2 3, s am@ 195g egli, gngggggpd-`observed that t ey produce reliatlyely large rainine outwardly aoolofsider i the outer regiert of the deiiiediy ,the Search@ .afblldSlbute@ llngihmi 1th? fatiga' :being irri SQ. In this Figure 1l illS/Fii.S,Sii?li-ig the 30 gated. The sprinklers iroduce practically noiriistother opening oftneetemu isintorsooingtho o1' fino spray @ed thereminime?? ,of loss 1are ,coriof tho ooooooo .f E, 1i looeg 'thoiiloFigillflo .-Silu-t-.od to .Pfodeoo little be?? pre'sio :tho Water l1 thestem il is in a position stiloetaggztiaily as .bel-ng free Lto Aflowonkigh the pririlgiers with e HUSWMGQ in Figli@ 7- This W115i f'fam Cpicks 35 minimum Pf @stri-9 9.1L l The .imparfbitg (of .angfu' up WaterHowie@ opworfoly .'ogroliod 'thoo'tom -H lol" ,motion totho o.. A fromthe passage' portion 4t Per angular Imotion .coixgsttiites .the tivepower for radially outward Tous the footer of the gyrotioo ood'roioiinoStom, is ofoooiod 'witlof stroom .C and .the Awater from the passageportion out orooooihoeoy ,Soboio'liol book orfooouro The oo mixed onf-.1thioamiod .owgio tooroootoo in 4o orotioo ood-rotation o tho-.Stom il,automoti- Figuro 11 by the stroom E. This mixo Collo' .oloor thofoprihklooo .of diro 'oust yfoto; .iid stroom or spray of ,drops @sie@is oww aoouros froo pootii'o otiolrrof the .Sorlikl'ofslriftintermediate .idisjtalnee eii; alltnges intermediate IZone l,of,theareafloel Having described only typical .preferred ,emr is to beunderstood that bor on bodilxierits .of iyetol LIl'o-I`iot31sh-tofbe ofthe stream .G Whigh limited `to the speeilc giet is fbrfeti, butm ishtwo openings .26 .ere ooosogo portion .3.5 ,to o streams CWiobootinoorooot `ortho We from the :Passage portion At streams()maybotlgegiteildt th thermofo, otohs time hea possagoiportion 351s 50Ifloim: i f f1 ,fluid disohorsinefdoyioe comprising afvbody Hoving .oninternal l.ydolixxng a fluid outlet ybote .o tubular .stom orrorilsod.longitudinany .in :tho outlet `loot@ ondfof .smaller-diameter than .the

55 boro to .loot/fo o-fpoosoge therein, .bearing means for il?? .otonoet? inoiofoseeoodrom .tho .ouiofoed of tho body-Permittee.-rotoiionlofthe Stom'obot ,its otto .foso io f est?? i L\.=...jd @@1396 wgil in .are

:cation-.ond rotatonoitho stom .able .11.1it..eiseres'ipttrsnioiob ni..

L iributozo of the Witter owithoutfetl noiosito.rogulotooororooortionftli. idiom. l woto1-oioohoreoo irotn theopenings f2.5 sind the A h 11b a passage mouth portion 35. Figure 13illustrates 75 @om in m tassa@ 11o, .which 2. A fluid discharging devicecomprising a body having an internal wall defining a fiuid outlet bore,a tubular stem arranged longitudinally in the bore and of appreciablysmaller diameter than the bore to leave a passage therein, bearing meansfor supporting the stem at a point spaced from the outer end of the bodyfor rotation about its own axis and permitting free gyration of the stemabout said point while inclined to lean against said internal wall ofthe body adjacent the outer end thereof, means spaced a considerabledistance outwardly from said point for imparting angular motion to thefluid flowing through said passage to gyrate the stem about said pointand thus cause rotation of the stem about its own axis by reason of saidengagement of the stem with said internal wall of the body, the gyrationof the stern breaking up the nuid stream issuing from said passage,

the stem projecting outwardly beyond the fluidf discharging outer end ofthe body and the tubular stem being open at its inner end for thereception of fluid, and a defiector head on the projecting end of thestem for directing said fluid stream, the projecting portion of the stemhaving at least one opening for the discharge of fluid from the stem,the last-named opening being directed laterally and being below saidhead so that the stream of fluid issuing therefrom intersects the streamissuing from said passage.

3. A fluid discharging device comprising a body having an internal walldefining a iiuid con-- ducting bore, a tubular stem arrangedlongitudinally in the bore and of smaller diameter than the bore toleave a fluid passage therein, bearing means at a point spaced inwardlyfrom the outer end of the body for positioning the stem and for allowingrotation of the stein about its own axis and gyration of the stem aboutsaid point while inclined to lean against said wall in a region spacedoutwardly from said point, means for imparting angular motion to thefluid flowing through said passage to cause substantial gyration of thestem and thus cause rotation of the stem about its own axis by reason ofsaid engagement of the stem with said wall, the gyration of the stembreaking up the fluid stream issuing from said passage, the stemprojecting outwardly beyond the fluid-discharging outer end of the bodyand the stem being open at its inner end for the reception-of fiuid,adeflector head in the projecting end of the stem for directing saidfiuid stream, the projecting portion of the stem having at least onelaterally directed outlet for discharging a stream of fluid, andmanually regulable means on the stem for controlling the flow from saidoutlet.

4. A sprinkler comprising a body having an internal wall defining aliquid-conducting bore which is open at its outer end for the dischargeof liquid, a tubular stem of smaller external diameter than said borearranged longitudinally in the bore to extend from the outer endthereof, bearing meansl spaced from said outerk end of the borepositioning and restraining the stem for gyration while inclined withrespect to the axis of said bore so as to lean against and roll alongsaid wall of said bore adjacent said outer end thereof and carrying thestem for rotation about its own longitudinal axis, means for impartingangular motion to the liquid flowing through said bore to cause suchgyration of the stem, the rolling engagement of the stem with said wallof the opening causing rotation of the stem, the interior of the tubularstem constitut ing a liquid passage which is open at its inner end forthe reception of liquid, the gyration of the stem serving to break upthe liquid stream discharging from the outer end of said bore, and therebeing at least one liquid discharge opening in the gyrating rotatingtubular stem beyond the outer end of said body bore, and manuallyadjustable means for controlling the admission of liquid to the interiorof the tubular stem.

5. A sprinkler comprising a body having an internal wall defining aliquid-conducting bore which is open at its outer' end for the dischargeof liquid, a tubular stem of smaller external diameter than said borearranged longitudinally in the bore to extend from the outer endthereof, restraining and positioning bearing means spaced from saidouter end of the bore permitting gyration of the stem while inclinedwith respect to the axis of said bore so as to lean against and rollalong said wall adjacent said outer end thereof and carrying the sternfor rotation about its own longitudinal axis, means for impartingangular motion to the liquid flowing through said bore to cause suchgyration of the stem, the rolling engagement of the stem with said wallcausing rotation of the stem, the interior of the tubular stemconstituting a liquid passage open at its inner end for the reception ofliquid, the gyration of the stem serving to break up the liquid streamdischarging from the outer end of said bore, and at least one laterallyprojecting nozzle on the stem beyond said outer end of the body openingfor discharging liquid from the stem.

6. A sprinkler comprising a body having an internal wall defining aliquid-conducting bore which is open at its outer end for the dischargeof liquid, a tubular stem of smaller external diameter than said borearranged longitudinally in the bore to extend from the outer endthereof, positioning and restraining bearing means for the stem spacedfrom said outer end of the bore permitting gyration of the stem whileinclined with respect to the axis of said bore so as to lean against androll along said wall adjacent said outer end thereof and allowing thestem to rotate about its own longitudinal axis, means for impartingangular motion to the liquid flowing through said bore to cause suchgyration of the stem, the rolling engagement of the stem with said wallcausing rotation of the stem, the interior of the tubular stemconstituting a liquid passage open at its inner end to receive liquid,the gyration of the stern serving to break up the liquid streamdischarging from the outer end of said opening, and at least one liquiddischarging nozzle on the stem beyond the outer end of said body openingdirected laterally and tangentially so that the reactive effect of theliquid discharging therefrom slows rotation of the stem.

7. A sprinkler comprising a body having an internal wall defining anelongate liquid-conducting bore which is open at its outer end for thedischarge of liquid, a tubular stem of smaller external diameter thansaid bore arranged longitudinally in the bore to extend from the outerend thereof, bearing means spaced from said outer end of the openingallowing gyration of the stem while inclined at a substantial `anglewith respect to the axis of said bore so as to lean against and rollalong said wall adjacent said outer end thereof and carrying the stemfor rotation about its own longitudinal axis, said bearmosaici inwardlytherein, a collar on the stem, andfat; least one thrust bearing washeron the collar for engaging said second'surface, means for impartingangular motion to the liquid flowing through said bore to cause suchgyration of the stem, the rolling engagement of the stem with said walltubular stem constituting a liquid passage; the

gyration of theI "stem serving to break up the liquid stream dischargingfrom the outer'` endv4 beyond the outer end of said body bore.

s causing rotationof the stem. the interior of the.

14 outer end of said body opening, and a stationary deector on the bodyfor deiiecting the streams issuing from said bore and opening.

9. A fluid discharging device comprising a body having a fluid outletbore, a stem arranged longitudinally in the outlet bore and of smallerdiameter than the bore so as to leave a uid passage in the bore,positioning and restraining bearing means for the stem permittingrotation of the stem about its longitudinal axis and allowing the stemto gyrate about a point spaced inwardly from the outer end of the bodywhile inclined discharge opening in the gyrating rotating stemv'- Asprinkler comprising a body having an internal wall defining aliquid-conducting bore which is open at its'4 outer end for thedischarge ameter than said `lbore arranged longitudinally in the bore toextend .from the outer end thereof,

20 of liquid, a tubular stem of smaller external dil-5?:

bearing means spaced.; inwardly from said outerl end of the bore guidingthe stem for gyration while inclined withlrespect to the axis of saldi??opening so as to lean r.against and roll along said wall adjacentsaid-:puter end thereof and journaling the stem foi` rotation about itsown longitudinal axis, means gfor imparting angular fno-Q."

tion to the liquid OWng through said bore to ,cause such gyration o1;the stem, the rolling en gagement of the stein with said wall causingrotation of the stem'.`'the interior of the tubular stem constitutingaliquid passage. the gyrationl of the stem servingto break up the liquidstream* discharging from the outer end of said bore. and

there being at least one liquid discharge open-v ing in the gyratingrotating stem beyond the with respect to the longitudinal axis of thebore so as to lean against the wall of the bore, the stem having anouter end protruding beyond the outer end of the body, means forimparting angular motion to the uid flowing through said passage tocause gyration of the stem, the engagement o1' the gyrating stem withthe wall of the bore causing the stem to rotate, about its ownlongitudinal axis as it gyrateathe'f gyration of the stem breaking upthe uid stream issuing from the outer end of the outlet bore, the stemhaving a longitudinally extending fluid conducting bore open at itsinner end for the reception of fluid. and means on the protrudinguterend of the stem for discharging fluid fromv said bore of the gyratingand rotating stem.

JOHN O. HRUBY, Jn.

References Cited ln the file of this patent UNITED STATES PATENTS NumberName Date 510,496 Anderson Dec. 12, 1893 1,078,543 Hadden Nov. l1, 19131,140,259 Elliott et al. May 1,8, 1915 1,862,381 Le Moon June 7, 1932

